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Active and passive adverse event following immunization surveillance systems by country income level and WHO region.13,14
| Active surveillance | |||||
|---|---|---|---|---|---|
| |
Countries from which responses were received |
Maternal |
Infant |
Passive surveillance |
No system/Unknown |
| n | n | n | n | n | |
| Income Level | |||||
| High | 19 | 4 | 3 | 16 | 2 |
| Middle | 23 | 3 | 4 | 19 | 4 |
| Low | 5 | 2 | 0 | 4 | 1 |
| WHO Region | |||||
| The Americas | 9 | 3 | 3 | 9 | 0 |
| European | 18 | 1 | 3 | 15 | 3 |
| African | 8 | 1 | 0 | 6 | 2 |
| South-East Asian | 2 | 0 | 0 | 2 | 0 |
| Eastern Mediterranean | 5 | 2 | 1 | 2 | 2 |
| Western Pacific | 5 | 2 | 0 | 5 | 0 |
